In Spirogyra, sexual reproduction involves fusion of ____.

Two similar non-motile gametes

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Two dissimilar motile gametes

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One motile and one non-motile gametes

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Two similar motile gametes

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Solution

The correct option is B Two similar non-motile gametes
Sexual reproduction in spirogyra occurs through the process of conjugation. it involves the fusion of two morphologically similar but physiologically dissimilar gametes. One of the gamete is active which is male gamete and other is inactive which is female.
option A and option D describe similar morphology and similar physiology. therefore it is incorrect
Option B describes dissimilar morphology and similar physiology, therefore it is incorrect
Option C describes about only dissimilarity in their physiology. therefore it is correct

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